Ross Abekas AirCleaner ACL-A, Руководство пользователя, Страница: 14 / 24

Delays and Offsets
Delays are used to set the amount of time each screener
has to catch a violation. The system has a total amount
of delay (Total PGM Delay) that can be divided up
between the two screeners. Each screener can also be
assigned a video and audio reaction time offset to
compensate for that particular user.
An audio offset is also available to compensate for any
audio/video synchronization issues.
Total PGM Delay
The Total PGM Delay is the total delay, in seconds,
applied to the audio/video stream by the system between
the PGM IN and the PGM OUT. If you have a single
screener, they get the entire delay interval. If you have
two screeners, the delay interval is divided between the
two screeners with the Screener 2 Delay parameter
determining how much of the total delay is allocated to
screener 2.
To Set the Total PGM Delay
This parameter has a variable range that depends on the
video format of the system is operating in, as well as the
amount of delay memory installed.
1. Use the SELECT knob to select Total PGM Delay .
2. Use the SET knob to select the amount of delay you
want to use. (0 to max)
The maximum amount of time available depends on
the model of AirCleaner
®
you have and the video
format you are working in. The higher the format,
the less time is available.
Audio PGM Offset
The PGM Audio Offset is used to correct any
audio-to-video synchronization errors on the incoming
audio/video. If an upstream device causes the audio to
be 'slipped' in time with respect to the video, this
parameter can correct the audio/video synchronization.
The maximum possible audio offset that can be
programmed is +/–10 seconds, depending on the current
Total PGM Delay value. The range of the audio offset
will decrease if the total program delay is set below 10
seconds.
To Set the PGM Audio Offset
This adjusts the offset applied to the audio relative to
video in tenths of a second to correct synchronization
errors.
1.
Use the
SELECT
knob to select
PGM Audio
Offset
.
2. Use the SET knob to select the amount of offset you
want to apply to the audio.
•
-X
— to advance the audio relative to video
(which decreases the audio delay) a value up to
the value of the current Total PGM Delay can
be selected, or to a maximum of –10 seconds
(whichever is smaller).
• +X — to delay the audio relative to video (which
increases the audio delay) a value up to the value
of the current Total PGM Delay parameter can
be selected, or to a maximum of +10 seconds
(whichever is smaller).
Screener 2 Delay
The Screener 2 Delay is the amount of the total delay
that is assigned to screener 2. This delay is applied for
screener 2 on the TAP OUT feed.
If Total PGM Delay is set to 8:00 seconds, and the
Screener 2 Delay is set to 3:00 seconds, then the PGM
IN feed is delayed by 3:00 seconds before arriving at the
TAP OUT for screener 2. It then takes an additional 5:00
seconds for the audio/video to arrive at the PGM OUT.
To Set the Screener 2 Delay
This adjusts the delay between the audio/video on the
PGM IN feed versus the TAP OUT by selecting how
much of the total delay is allocated to screener 2.
1. Use the SELECT knob to select Screener 2
Delay
.
2.
Use the
SET
knob to select the amount of delay you
want to assign to screener 2. (0:01 to Total PGM
Delay)
The maximum amount of time available depends on
the model of AirCleaner
®
you have and the video
format you are working in. The higher the format,
the less time is available.
Video Reaction Times
The Video Reaction selects the reaction time delay for
a screener when the Video Panic Button for that screener
is pressed. In a two-screener system there are separate
reaction times for both screeners. This will back-time
the button press to compensate for the time it takes the
screener to see a violation and then press the VIDEO
panic button.
14 • Delays and Offsets — Abekas AirCleaner User Manual (v3.5)